Stubby,
Good faith counts for a something, especially if you've dug hard into the numbers.
The one thing I couldn't quite resolve to my own satisfaction was a chain of corporate acquisitions, starting with Newton Savings Bank and ending with Bank of America. Somewhere around the third or forth bank in the chain, and two or three steps short of BoA, the requisite information about how many shares of this were exchanged for how many shares of that was flat-out missing. Yeah, with quite a bit of work I could get the prices of the shares the days before and after the acquisition and the amount of shares my parents ended up with, but there's always these fractional amounts that sometimes get delivered to the holders as cash or result in changes to the ratios of shares in/shares out. Called BoA a couple of times since they were the inheritor of all these banks, but it was useless: They simply don't like responding. It's probably buried in the SEC files, but it wasn't in the on-line material. Sometimes there's news blurbs about the numbers in the financial pages of newspapers, but nothing online went back that far. So, being careful, I fudged the numbers as best I could.
I suppose that some IRS wonk could claim fraud, but this is where due diligence and common sense kick in.
If you have checkbooks that go back that far, you know how much you paid. You can get historical data from the likes of Yahoo. Further, if any of the companies are still in existence or got bought out by other public companies you can usually get stock prices on any given day going back, sometimes, 30 years. Finally, and weirdly enough, the companies whose stock you hold _do_ know that you're a stockholder and what day you became a stockholder. Calling them up can usually get you a nice clerk who can help you in that regard. Good luck!
Ken Becker